When will air quality improve? A lot is riding on the wind
Millions of Americans are under air quality alerts as wildfires burn in Canada. Experts say the weather pattern could change by early next week, and stress the need to take precautions until then.
Millions of Americans from the Northeast to the Midwest were under air quality alerts on Thursday, as smoke from Canadian wildfires continues to fill the skies.
The haze — which contains particulate matter that poses both short- and long-term health risks — has disrupted air travel, sporting events and all sorts of outdoor activities.
Officials are warning people, especially children, the elderly and those with heart and respiratory conditions, to take precautions and stay inside until the smoke clears, which could take days.
"There's nothing you can do about the processes of
